Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

MOSAIC INTERVENTIONAL PSYCHIATRY
NPI 1821994690
Clinic/Center - Mental Health (Including Community Mental Health Center) in Fairfax, VA

Q: What is Mosaic Interventional Psychiatry's NPI number?

The NPI number for Mosaic Interventional Psychiatry is 1821994690. It was assigned to this organization in the NPPES registry on October 17, 2026.

Q: What is Mosaic Interventional Psychiatry's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.

Active since October 17, 2026

8324 PROFESSIONAL HILL DR, FAIRFAX, VA 22031(703) 261-4493(907) 802-6601 Get Directions Write a Review

NPPES record added: October 17, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Mosaic Interventional Psychiatry NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MOSAIC INTERVENTIONAL PSYCHIATRY (NPI 1821994690) is a healthcare organization registered as a mental health (including community mental health center) in Fairfax, Virginia and active in the NPI registry since October 2026. The organization lists Adam O'neill, Owner, as its authorized official.

NPPES Registry Identity

NPI1821994690

Entity TypeOrganization

Primary Taxonomy261QM0801X

Legal Business NameMOSAIC INTERVENTIONAL PSYCHIATRY

Location Address8324 PROFESSIONAL HILL DRFairfax, VA 22031-4611

Mailing Address8324 Professional Hill DrFairfax, VA 22031-4611 · (703) 261-4493 · Fax (907) 802-6601

Phone(703) 261-4493

Fax(907) 802-6601

Organization SubpartNo

Authorized OfficialAdam O'neillOwner · (703) 261-4177

Enumeration DateOctober 17, 2026

NPPES CertifiedOctober 17, 2026

✔ NPI 1821994690 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Mental Health (Including Community Mental Health Center)Ambulatory Health Care Facilities

Taxonomy Code261QM0801X

8324 PROFESSIONAL HILL DR, Fairfax, VA 22031

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Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JOANNE HERRMAN MD

Obstetrics & Gynecology (Gynecology)

8324 PROFESSIONAL HILL DR
FAIRFAX, VA 22031

Fairfax County (703) 573-5600

ADAM O'NEILL & ASSOCIATES LLC

Psychiatry & Neurology (Psychiatry)

8324 PROFESSIONAL HILL DR
FAIRFAX, VA 22031

Fairfax County (703) 261-4177

ADAM ONEILL PA-C

Physician Assistant

8324 PROFESSIONAL HILL DR
FAIRFAX, VA 22031

Fairfax County (703) 261-4177

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mosaic Interventional Psychiatry's NPI number?

The NPI number for Mosaic Interventional Psychiatry is 1821994690. It was assigned to this organization in the NPPES registry on October 17, 2026.

Where is Mosaic Interventional Psychiatry located?

Mosaic Interventional Psychiatry is located at 8324 Professional Hill Dr, Fairfax, VA 22031. The listed phone number is (703) 261-4493.

What is Mosaic Interventional Psychiatry's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.

When was this NPI record last updated?

The NPPES record for Mosaic Interventional Psychiatry was last updated on October 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.